CN201448055U - PDC expanding bit - Google Patents
PDC expanding bit Download PDFInfo
- Publication number
- CN201448055U CN201448055U CN2009200341087U CN200920034108U CN201448055U CN 201448055 U CN201448055 U CN 201448055U CN 2009200341087 U CN2009200341087 U CN 2009200341087U CN 200920034108 U CN200920034108 U CN 200920034108U CN 201448055 U CN201448055 U CN 201448055U
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- Prior art keywords
- drill
- pdc
- guiding
- bit
- cutting element
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- Expired - Fee Related
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Abstract
The utility model discloses a PDC expanding bit, and belongs to expanding bits used for rock drilling under a coal mine or in ground exploration. The expanding bit comprises a steel drill bit body and a guiding drill in rigid connection with the inner wall of the steel drill bit body, wherein, a stepped protrusion is formed on the outer surface of the steel drill bit body; a cutting tool made of a novel superhard material PDC (polycrystalline diamond compact) is welded on the lower end surface of the stepped protrusion; a reversed cutting tool is welded on the upper end surface of the stepped protrusion; gauge protection hard alloy is embedded on the outer wall of the stepped protrusion; a water through hole is formed in the guiding drill from the top down; gauge protection hard alloy is embedded at the lower part on the side wall of the guiding drill at intervals; and a drain hole is formed in the middle of the guiding drill in a position in front of the cutting tool. The utility model has the characteristics that when the capability of a drilling machine is insufficient, or to meet special engineering requirements, the expanding bit can drill large-diameter drill holes; and the drill bit has the advantages of long service life, good guiding performance and strong gauge protection performance.
Description
Technical field
The utility model belongs to the drilling project technical field, relates to the reaming bit of exploring rock-boring under a kind of coal mine with ground, particularly relates to a kind of PDC reaming bit.
Background technology
Large diameter borehole can't be directly crept at drilling project middle low power rig at present, when carrying out reaming by the method for secondary pore-forming, reaming bit need be used with the small-power rig.Tradition carbide alloy reaming bit does not generally possess guidance capability, to such an extent as to drill bit often departs from former boring, and drill bit use carbide cutting tool, application life is short, protects the footpath weak effect.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, good, the long service life of steering capability, the strong PDC reaming bit of guarantor's footpath effect when providing a kind of small-power rig to carry out reaming by the method for secondary pore-forming.
For achieving the above object, the technical solution adopted in the utility model is: it comprises drill steel body and the guiding awl that is rigidly connected with its inwall, it is characterized in that: described steel external surface is equipped with the notch cuttype projection, described notch cuttype projection lower surface is welded with cutting element, notch cuttype projection upper surface is welded with reverse cutting element, notch cuttype projection outer wall is inlaid with protects the footpath carbide alloy, described guiding awl inside was provided with the water through hole from top to bottom, its lower sidewall is inlaid with guarantor's footpath carbide alloy at interval and the middle part is provided with drain hole, and described drain hole is positioned at cutting element the place ahead.
Described cutting element is composite polycrystal-diamond PDC.
Described reverse cutting element is composite polycrystal-diamond PDC.
The utility model compared with prior art has the following advantages:
(1) adopt the guiding awl, drill bit has good guidance quality, unlikelyly departs from former boring.
(2) use composite polycrystal-diamond PDC as cutting teeth, drilling life of bit is long.
(3) steel body, guiding awl outer wall are inlaid with and protect the footpath carbide alloy, and the bit gauge protection performance is strong.
(4) the reverse cutting element that is provided with of drill steel body notch cuttype projection upside can guarantee to pull out of hole smoothly when hole wall falls piece.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Description of reference numerals:
1-drill steel body; The 2-awl that leads; 3-notch cuttype projection;
The 4-carbide alloy; 5-crosses the water through hole; The 6-cutting element;
7-side drain hole; The reverse cutting element of 8-.
The specific embodiment
As shown in Figure 1, the utility model comprises drill steel body 1 and the guiding awl 2 that is rigidly connected with its inwall, described drill steel body 1 external surface is equipped with notch cuttype projection 3, described notch cuttype projection 3 lower surfaces are welded with cutting element 6, notch cuttype projection 3 upper surfaces are welded with reverse cutting element 8, notch cuttype projection 3 outer walls are inlaid with protects footpath carbide alloy 4, described guiding is bored 2 inside and was provided with water through hole 5 from top to bottom, guiding awl 2 lower sidewall are inlaid with at interval protects footpath carbide alloy 4, guiding awl 2 middle parts are provided with drain hole 7, and described drain hole 7 is positioned at cutting element 6 the place aheads.
Described cutting element 6 is composite polycrystal-diamond PDC.Described reverse cutting element 8 is composite polycrystal-diamond PDC.Composite polycrystal-diamond PDC is to be micron-sized diamond particles with after metal dusts such as Co, Ni evenly mix by granularity, under high-temperature and high-pressure conditions, at the last synthetic a kind of new material of tungsten carbide (WC) substrate.Because composite polycrystal-diamond PDC has the following advantages: 1. have very high hardness and intensity, its hardness is only second to natural diamond, and its hardness is consistent in all directions with abrasion resistance, need not select to.Its intensity is because the higher carbide alloy of flexible supports its compound flexural strength σ
bCan reach 1500MPa.2. have very high abrasion resistance, its abrasion resistance is generally 60～80 times of carbide alloy.When the higher nonmetals of cutting hardness, its tool life is high.3. have lower friction factor, the friction factor of composite polycrystal-diamond PDC and cutting material is 1/3～1/2 of carbide alloy and a cutting material friction factor.When using the PDC cutter, can reduce cutting force and cutting degree about 1/3～1/2.4. have very high thermal conductivity, the coefficient of thermal conductivity of composite polycrystal-diamond PDC is 1.5～7 times of carbide alloy.Can reduce the temperature of cutting region when using the PDC cutter greatly, improve tool life.So, when using composite polycrystal-diamond PDC as the bit cutting tool, the bit cutting tool not only has superior functions such as adamantine high rigidity, high-wearing feature, high-termal conductivity, low-friction coefficient, low thermal coefficient of expansion, also have good intensity of carbide alloy and toughness simultaneously, its application life big leap ahead.
During use, the PDC reaming bit that will have the guiding awl is screwed on the drilling rod, after rig starts, the drill bit guiding relies on guiding awl 2, protects the footpath by carbide alloy 4, creeps into cutting by cutting element 6, when trip-out is hampered by reverse cutting element 8. so, drill bit has good guidance quality and protects the footpath property, and long service life, and it is smooth and easy to pull out of hole.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; every according to the utility model technical spirit to any simple modification, change and equivalent structure transformation that above embodiment did, all still belong in the protection domain of technical solutions of the utility model.
Claims (3)
1. PDC reaming bit, comprise drill steel body (1) and the guiding awl (2) that is rigidly connected with its inwall, it is characterized in that: described drill steel body (1) external surface is equipped with notch cuttype projection (3), described notch cuttype projection (3) lower surface is welded with cutting element (6), notch cuttype projection (3) upper surface is welded with reverse cutting element (8), notch cuttype projection (3) outer wall is inlaid with protects footpath carbide alloy (4), described guiding awl (2) inside is provided with water hole (5) from top to bottom, guiding awl (2) lower sidewall is inlaid with at interval protects footpath carbide alloy (4), guiding awl (2) middle part is provided with drain hole (7), and described drain hole (7) is positioned at cutting element (6) the place ahead.
2. according to the described PDC reaming bit of claim 1, it is characterized in that: described cutting element (6) is composite polycrystal-diamond PDC.
3. according to the described PDC reaming bit of claim 1, it is characterized in that: described reverse cutting element (8) is composite polycrystal-diamond PDC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200341087U CN201448055U (en) | 2009-08-04 | 2009-08-04 | PDC expanding bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200341087U CN201448055U (en) | 2009-08-04 | 2009-08-04 | PDC expanding bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201448055U true CN201448055U (en) | 2010-05-05 |
Family
ID=42552770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200341087U Expired - Fee Related CN201448055U (en) | 2009-08-04 | 2009-08-04 | PDC expanding bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201448055U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265178A (en) * | 2014-09-16 | 2015-01-07 | 四川省一三五勘察设计有限公司 | Reaming cutting tool |
| CN104763348A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type drilling and expanding integral drilling tool and drilling and hole expandin method thereof |
| CN109441358A (en) * | 2018-10-30 | 2019-03-08 | 龙在云 | A kind of rotary swing arm abrasive drill structure |
| CN110454091A (en) * | 2019-09-23 | 2019-11-15 | 山东源运通矿山装备科技有限公司 | Diamond bit |
| CN113846983A (en) * | 2021-10-08 | 2021-12-28 | 核工业二四三大队 | Blade for cutting uranium mining sleeve and reaming mineral-containing aquifer |
-
2009
- 2009-08-04 CN CN2009200341087U patent/CN201448055U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265178A (en) * | 2014-09-16 | 2015-01-07 | 四川省一三五勘察设计有限公司 | Reaming cutting tool |
| CN104265178B (en) * | 2014-09-16 | 2016-08-24 | 四川省美地佳源实业有限公司 | Broad |
| CN104763348A (en) * | 2015-03-05 | 2015-07-08 | 成都理工大学 | Embedded bionic nozzle type drilling and expanding integral drilling tool and drilling and hole expandin method thereof |
| CN109441358A (en) * | 2018-10-30 | 2019-03-08 | 龙在云 | A kind of rotary swing arm abrasive drill structure |
| CN110454091A (en) * | 2019-09-23 | 2019-11-15 | 山东源运通矿山装备科技有限公司 | Diamond bit |
| CN113846983A (en) * | 2021-10-08 | 2021-12-28 | 核工业二四三大队 | Blade for cutting uranium mining sleeve and reaming mineral-containing aquifer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20100804 |